Casting Line and Rope 65 
This is very important, else when hauling up the line the rope 
may get caught, especially as it passes over the bough. The rope 
having been overhauled, the climber gets into a bowline (or a bow- 
line-on-a-bight) or if the tree be very big and awkward, into a 
canvas sling, and is hauled up. 
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CLIMBING A TALL FIR TREE WITH THE AID OF A ROPE. 
During the ascent he should do all he can to ‘“lighten-up ” his 
weight. As soon as the tree becomes small enough for him to 
encircle even a portion of it with his arms, he must do so and the 
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